초록 ▼

A chair which includes a seat frame having depending leg members and a pair of upstanding, spaced apart members arranged to provide a lower backrest part for the chair and an upper backrest frame part having a pair of spaced apart depending members in registry with the upstanding members, said membe

A chair which includes a seat frame having depending leg members and a pair of upstanding, spaced apart members arranged to provide a lower backrest part for the chair and an upper backrest frame part having a pair of spaced apart depending members in registry with the upstanding members, said members being hollow with open extremities, and flexible spring means secured between each pair of members to provide an articulated, flexible spring backrest for the chair. Each flexible spring means includes a molded plastic support strut having a wire cable flexible core to maintain the strut under compression and limit the elongation thereof when a force is exerted on the backrest by a user of the chair.

대표청구항 ▼

A chair comprising, a seat assembly which includes a support frame and depending leg members, a lower backrest frame part having a pair of spaced apart frame members upstanding relative to the seat support frame, an upper backrest frame part having a pair of spaced apart depending frame members arra

A chair comprising, a seat assembly which includes a support frame and depending leg members, a lower backrest frame part having a pair of spaced apart frame members upstanding relative to the seat support frame, an upper backrest frame part having a pair of spaced apart depending frame members arranged in registry with the upstanding frame members, said frame members being hollow with open extremities, and spring members secured between each registered pair of frame members to provide an articulated, flexible spring backrest for the chair, each spring means including a molded plastic support strut with an elongate passageway therein, a substantially non-extensible flexible member disposed within said passageway and means securing said flexible member at each end of said passageway so as to maintain the strut under longitudinal compression and limit the elongation thereof when a force is exerted on the backrest.